This is a U-shaped baby pillow made of breathable mesh material called Geltron by Pacific Wave. It is washable and hygienic. ▼What is Geltron? It is a multi-layered, three-dimensional gel developed to relieve pressure on the body during sleep, and is used in mattresses, pillows, cushions, and more. With a texture like gummy candy, it flexibly conforms to the body's contours and movements, eliminating all burdens that interfere with sleep. My child used it for a few months last year. After they started rolling over, both the pillow and cover were washed at home and stored. No scented detergents or fabric softeners were used. There are no smokers or pets in the household. The cover is 100% cotton, so there is some pilling from washing. Thank you for looking.